The portal registry (basically the left-hand menu navigation) is made up of folders that can contain subfolders and/or content references. Content references point to different types of content, but most of the time in your HCM, FSCM or CRM application they point to components. 
The portal registry security table is called PSPRSMPERM. This table defines which permission lists and roles are assigned to each folder and content reference. 

So if you migrate a new permission list into an environment, how do you get the portal registry synchronized? Well, that’s the job of Portal Security Sync. 
Portal security sync can be a confusing process. In this article I’ll try to make some sense of what it is, why it’s necessary, what kinds of issues you can expect, and some alternatives. 
Portal Security Sync is an app engine that basically goes through all of your permission lists, grabs the components, and figures out which content references that permission list relates to. Then it updates the content reference with that permission list, and walks up the folder hierarchy updating each parent folder with that permission list as well. The table that gets updated is – you guessed it – PSPRSMPERM. Starting with PeopleTools 8.4

Read Further:http://srini-peoplesoft.blogspot.com/2014/04/portal-security-sync.html